3ct Tanzanite (Cushion, 8.47×8.47mm, Blue) vs 3ct Kyanite (Cushion, 8.21×8.21mm, Blue)
Quick summary: When looked from above (face-up position), 3ct Tanzanite (8.47×8.47mm, cushion cut) appears 6% larger than 3ct Kyanite (8.21×8.21mm, cushion cut). See below how they compare side-by-side on a ring and finger.
| 3ct Tanzanite (cushion cut) |
vs
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3ct Kyanite (cushion cut) |
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blue |
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| 8.47×8.47 mm | 8.21×8.21 mm | |
| actual size | ||
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Actual size is set for screen
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Ring:
Skin tone:
Ring width: 3.0 mm
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64 mm |
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Actual sizes of
3ct Tanzanite Cushion (8.47×8.47mm, Blue)
and
3ct Kyanite Cushion (8.21×8.21mm, Blue)
as they would appear on a ring and finger.
Adjust the ring and finger size to get an idea of how these gemstones would look on your finger.
Where to buy?
For certified gemstones, high-end gemstone jewelry, and birthstone jewelry, see Blue Nile
Face-up Size
All things being equal, Kyanite will face-up smaller than Tanzanite for a given
carat weight, because it has higher specific gravity
(3.68 vs. 3.35 - this means it's "heavier" compared to Tanzanite of the same size). Face-up size also depends heavily on the proportions of the cut.
Face-up area is a measure of the size of the gem when viewed from above (as set in a ring). It tells you how big the gem is at the girdle plane.
Face-up area is a measure of the size of the gem when viewed from above (as set in a ring). It tells you how big the gem is at the girdle plane.
| 3 Ct Tanzanite (Cushion) | 3 Ct Kyanite (Cushion) | |
| 8.47×8.47 mm | vs | 8.21×8.21 mm |
| 64.57 mm² | 60.66 mm² |
| 3ct Tanzanite Cushion (8.47×8.47mm) | |
| 3ct Kyanite Cushion (8.21×8.21mm) | |
| Difference: 6% (3.91 mm²) |
3ct Tanzanite (Cushion, 8.47×8.47mm) has approx. 6% more face-up area than 3ct Kyanite (Cushion, 8.21×8.21mm).
Popular comparisons:
- 4.6ct Tanzanite (Cushion, Blue, 11 x 9) vs. 4.8ct Tanzanite (Oval, Blue, 11 x 10)
- 4.02ct Tanzanite (Cushion, Blue, 10 x 8) vs. 3.47ct Aquamarine (Cushion, Light Blue, 9.65 x 9.65)
- 2ct Tanzanite (Cushion, Blue, 7.51 x 7.51) vs. 2ct Diamond (Cushion, White, 7.34 x 7.34)
- 1ct Tanzanite (Cushion, Blue, 5.96 x 5.96) vs. 1ct Diamond (Cushion, White, 5.83 x 5.83)
- 2.75ct Tanzanite (Cushion, Blue, 8.35 x 8.35) vs. 1ct Sapphire (Cushion, Blue, 5.59 x 5.59)
- 5.46ct Tanzanite (Cushion, Blue, 10.5 x 10.5) vs. 3.07ct Emerald (Emerald, Green, 10.58 x 7.84)
- 2ct Tanzanite (Cushion, Blue, 7.51 x 7.51) vs. 7ct Tanzanite (Cushion, Blue, 11.4 x 11.4)
- 1.2ct Tanzanite (Cushion, Blue, 6.34 x 6.34) vs. 1.3ct Tanzanite (Emerald, Blue, 7.43 x 5.5)
- 7.86ct Tanzanite (Cushion, Blue, 11.85 x 11.85) vs. 2.7ct Tanzanite (Cushion, Blue, 8.2 x 7.2)